var Map = function(){
	
	this.data = [];
	
}

Map.prototype = {

	put : function(key, value) {
	
		this.data[key] = value;	
	},
	
	get : function(key) {
	
		return this.data[key];
	},
	
	remove : function(key) {
	
		this.data[key] = null;
	
	},
	
	isEmpty : function() {
	
		return this.data.length == 0;
	},
	
	size : function() {
	
		return this.data.length;
	}

}